package com.example.reggie.filter;

import com.alibaba.fastjson.JSON;
import com.example.reggie.utils.BaseContext;
import com.example.reggie.utils.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Slf4j
@WebFilter(filterName = "checkLoginFilter",urlPatterns = "/*")
public class CheckLoginFilter implements Filter {
    //路径匹配器，支持通配符
    private static final AntPathMatcher PATH_MATCHER = new AntPathMatcher();
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        String[] urls =new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/user/sendMsg",
                "/user/login"
        };
        log.info("拦截到请求:{}，处理中...",request.getRequestURL());
        String requestURI = request.getRequestURI();
        if (checkUri(urls,requestURI)){
            filterChain.doFilter(request,response);
            return;
        }
        if (request.getSession().getAttribute("employee") != null){
            log.info("用户已登录");
            BaseContext.setId((Long) request.getSession().getAttribute("employee"));
            filterChain.doFilter(request,response);
            return;
        }
        if (request.getSession().getAttribute("user") != null){
            log.info("用户已登录");
            BaseContext.setId((Long) request.getSession().getAttribute("user"));
            filterChain.doFilter(request,response);
            return;
        }
        log.info("用户未登录");
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
        return;

    }
    public boolean checkUri(String[] urls,String uri){
        for (String url : urls) {
            boolean match = PATH_MATCHER.match(url, uri);
            if (match){
                return true;
            }
        }
        return false;
    }
}
